4 ms·
In my area in the winter you always sense air pollution. But with just a nose it's hard to say if it's 100 μg/m3 of or 200 μg/m3 of PM2.5.
by gbajson 3y ago
In my area in the winter you always sense air pollution.
But with just a nose it's hard to say if it's 100 μg/m3 of or 200 μg/m3 of PM2.5.